/* -*- Mode:C++; c-file-style:"gnu"; indent-tabs-mode:nil; -*- */

/*

 * Copyright (c) 2006 INRIA

 *

 * This program is free software; you can redistribute it and/or modify

 * it under the terms of the GNU General Public License version 2 as

 * published by the Free Software Foundation;

 *

 * This program is distributed in the hope that it will be useful,

 * but WITHOUT ANY WARRANTY; without even the implied warranty of

 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

 * GNU General Public License for more details.

 *

 * You should have received a copy of the GNU General Public License

 * along with this program; if not, write to the Free Software

 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA

 *

 * Author: Mathieu Lacage <mathieu.lacage@sophia.inria.fr>

 */

#include "scheduler-factory.h"

#include "ns3/assert.h"

#include "ns3/fatal-error.h"

#include "ns3/default-value.h"

namespace ns3 {

SchedulerFactory::~SchedulerFactory ()

{}

Scheduler *

SchedulerFactory::Create (void) const

{

  return DoCreate ();

}

Scheduler *

SchedulerFactory::CreateDefault (void)

{

  NS_ASSERT_MSG (!GetList ()->empty (), "No Scheduler factory registered");

  std::string defaultValue = GetDefault ()->GetValue ();

  for (List::const_iterator i = GetList ()->begin ();

       i != GetList ()->end (); i++)

    {

      if (i->second == defaultValue)

        {

          return i->first->Create ();

        }

    }

  NS_ASSERT (false);

  // quiet compiler

  return 0;

}

Scheduler *

SchedulerFactory::Create (const std::string &name)

{

  for (List::iterator i = GetList ()->begin ();

       i != GetList ()->end (); i++)

    {

      if (i->second == name)

        {

          return i->first->Create ();

        }

    }

  NS_ASSERT_MSG (false, "Tried to create non-existant scheduler: " << name);

  // quiet compiler.

  return 0;

}

void 

SchedulerFactory::AddDefault (const SchedulerFactory *factory,

                              const std::string &name)

{

  GetDefault ()->AddDefaultValue (name);

  GetList ()->push_back (std::make_pair (factory, name));

}

void 

SchedulerFactory::Add (const SchedulerFactory *factory,

                       const std::string &name)

{

  GetDefault ()->AddPossibleValue (name);

  GetList ()->push_back (std::make_pair (factory, name));

}

StringEnumDefaultValue *

SchedulerFactory::GetDefault (void)

{

  static StringEnumDefaultValue value ("Scheduler", "Event Scheduler algorithm");

  return &value;

}

SchedulerFactory::List *

SchedulerFactory::GetList (void)

{

  static SchedulerFactory::List list;

  return &list;

}

}; // namespace ns3